Question

ПОМАГИТЕ РЕШИТЬ ПЖ?!?!

Answer 1

$\frac{ {x}^{2} - 1}{2} - 11x = 11 \: \: \: | \: \times 2 \\ {x}^{2} - 1 - 22x = 22 \\ {x}^{2} - 1 - 22x - 22 = 0 \\ {x}^{2} - 23 - 22x = 0 \\ {x}^{2} + x - 23x - 23 = 0 \\ x(x + 1) - 23(x + 1) = 0 \\ (x - 23)(x + 1) = 0 \\ \\ x - 23 = 0 \: \: \: \: \: \: \: x + 1 = 0 \\ x_{1} = 23 \: \: \: \: \: \: \: \: \: \: \: \: \: x_{2} = - 1$